Submission

Score: 100

User: chokun

Problemset: ISBN

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-13 09:39:01

#include <bits/stdc++.h>
using namespace std;

int main(){
    int sum = 0;
    int weight = 10;

    for (int i = 0; i < 9; i++){
        int n;
        cin >> n;
        sum += weight * n;
        weight--;
    }
    cout << (11 - (sum % 11)) % 11;
}